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Re: WinSCP .NET ListDirectory seems to lock the directory

Please attach a full session log file showing the problem (using the latest version of WinSCP).

To generate the session log file, set Session.SessionLogPath. Submit the log with your post as an attachment. Note that passwords and passphrases not stored in the log. You may want to remove other data you consider sensitive though, such as host names, IP addresses, account names or file names (unless they are relevant to the problem). If you do not want to post the log publicly, you can mark the attachment as private.

WinSCP .NET ListDirectory seems to lock the directory

I'm connecting to an FTP server hosted by a public webhost and everything works fine (uploading and deleting files, creating and removing directories) until I use the ListDirectory command. I get the file listing but after that the FileExists returns false and I'm not able to remove the directory. Closing and recreating the session makes the problem go away but that can't be intended? Connecting to the same FTP server with FileZilla works flawlessly.
public void TestSession()
    var pathToDir = "path-to-existing-dir";
    // This fails: second time FileExists is called it returns false
    var session = CreateSession();
    var dirExists1 = session.FileExists(pathToDir); // true
    var dirListing = session.ListDirectory(pathToDir);
    var dirExists2 = session.FileExists(pathToDir); // false
    // This works: closing and recreating the session
    session = CreateSession();
    var dirExists3 = session.FileExists(pathToDir); // true
    dirListing = session.ListDirectory(pathToDir);
    session = CreateSession();
    var dirExists4 = session.FileExists(pathToDir); // true
private Session CreateSession()
    var sessionOptions = new SessionOptions
        Protocol = Protocol.Ftp,
        HostName = _settings.Host,
        UserName = _settings.Username,
        Password = _settings.Password,
        PortNumber = _settings.Port
    var session = new Session();
    return session;